Bolt heading furnaces

If a flue poc carries heavy particulates and has ells (elbows) or horizontal sections where particles may be deposited, flues must be made even larger, and clean out doors must be provided, and used For some forge furnaces and for bolt heading furnaces, all the poc are purposely forced out the slot through which the stock is charged. 

Furnace and all rent down as if a bolt Of thunder had been driven through the house. Retorts, receivers, pelicans, bolt-heads All struck in shivers ... 

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